Horizon Pet Nutrition Legacy Cat & Kitten is a grain-free, all‑life‑stages dry formula focused on animal proteins to support growth, maintenance, and active lifestyles in both kittens and adult cats.

The first ingredient is chicken, reinforced by chicken meal and turkey meal to deliver concentrated, highly bioavailable amino acids for lean muscle development and repair.

At 40% crude protein and 19% fat with a metabolizable energy of 3870 kcal/kg, it provides a high energy density suitable for kittens and active adults, while requiring portion control for less active or indoor cats.

Salmon, salmon meal, and herring oil contribute omega-3s (0.83%) alongside omega-6s (3.2%) that support healthy skin, a glossy coat, and a balanced inflammatory response.

Carbohydrates come primarily from peas and pea starch, offering gluten-free and GMO-free, low-glycemic ingredients intended to help minimize blood sugar spikes and provide gentle fiber.

Probiotics added post-cooking (600 million CFU/lb), together with fructooligosaccharides and multiple fermentation extracts, support a healthy gut microbiome and digestive enzyme activity for stool quality and nutrient absorption.

Added taurine (0.20%) directly supports heart function and retinal health, key needs for both kittens and adult cats.

Fortification with chelated minerals (such as zinc, iron, manganese, and copper proteinate) and essential vitamins enhances nutrient absorption and supports immune resilience, skin integrity, and overall metabolic function.

The mineral balance lists calcium at 2.78%, phosphorus at 1.89%, and a calcium-to-phosphorus ratio of 1.5:1, providing structural support for bones and teeth—especially important during growth.

Yucca schidigera is included for inflammation mitigation and joint health support, complementing mobility needs across all life stages.

Pros:

• Animal-protein led formula: Starts with chicken and includes multiple concentrated poultry and fish meals to deliver complete amino acids for lean muscle.

• High energy for growth and activity: 40% protein, 19% fat, and 3870 kcal/kg fuel kittens and active cats while helping preserve muscle mass.

• Omega support from fish sources: Salmon, salmon meal, and herring oil provide omega-3s (0.83%) and omega-6s (3.2%) for skin, coat, and inflammation balance.

• Digestive health package: 600 million CFU/lb probiotics added post-cooking, plus FOS and fermentation extracts, support gut microbiota and enzyme activity for better digestion.

• Chelated minerals for absorption: Zinc, iron, manganese, and copper proteinate improve mineral bioavailability to support immune function, skin health, and metabolism.

• Taurine inclusion: 0.20% taurine directly supports cardiac function and vision in cats of all ages.

Cons:

• High ash content: At 9.8%, the total mineral load is relatively high and may not suit cats needing tighter mineral management.

• Elevated calcium and phosphorus: Calcium at 2.78% and phosphorus at 1.89% align with growth needs but may be more than some adult cats require.

• Pea-forward carbohydrate source: Reliance on peas and pea starch makes legumes a major carbohydrate and plant-protein contributor, which may not fit very low-carb preferences.

• Magnesium not disclosed: Lack of magnesium data limits a full assessment of the urinary mineral profile.

• Multiple animal proteins: Chicken, turkey, salmon, and egg may reduce suitability for cats that need a single-protein or elimination diet.

• Calorie-dense: With 3870 kcal/kg, careful portion control is needed for sedentary or weight-prone adult cats.